Something I just tried on a whim that saved my sanity doesn't seem immediately obvious, so I thought I'd point it out ...

Normally, when you close a document without saving, that's it, game over, document gone. In Stickies, you can actually undo closing a sticky note you didn't save -- even after you confirm with the "Don't Save" button! I had a floating note and didn't realize I was going to close that one. I hit undo, and it came back!

One thing I like about StickyBrain is that the context menu and/or keyboard shortcuts (via HotKey) can be used from Cocoa and Carbon applications. That makes its Grab Text functionality more useful than with Services which are limited to Cocoa apps (with a few exceptions).